| Month | CET | Anomaly | notes |
| January | 5.9 | -0.5 | |
| February | 8.2 | 1.6 | |
| March | 10.9 | 1.8 | |
| April | 11.8 | 0.0 | |
| May | 14.6 | -0.9 | |
| June | 20.2 | 1.6 | |
| July | 22.4 | 2.0 | |
| August | 19.8 | -0.3 | |
| September | 20.3 | 2.7 | |
| October | 15.2 | 1.2 | |
| November | 10.4 | 1.0 | |
| December | 8.7 | 1.4 |
Average for 2021: 14.06C, anomaly: 0.95C
Daily CET graph
